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I am trying to understand the relation between namespaces and clusters in EKS. Can 1 namespace span across multiple EKS clusters? Is that possible?

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  • The Kubernetes descendant OpenShift calls this "project" rather than "namespace" which I think makes it much more clear how to approach it and what it is good for. Commented Feb 15, 2021 at 15:20

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Kubernetes supports multiple virtual clusters backed by the same physical cluster. These virtual clusters are called namespaces.

Kubernetes concepts

So, no, a namespace can not span across multiple Kubernetes clusters. You can have namespaces with the same name in multiple clusters. But those would be different objects as a namespace is defined on the cluster level.

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  • That was very helpful. Thanks!
    – Biju
    Commented Feb 16, 2021 at 16:20

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